<template>
	<div class="app-container">
		
		<!-- 顶部 Header 区域 -->
				<mt-header fixed title="快乐购">
					<span slot="left" @click="goBack" v-show="flag">
						<mt-button icon="back">返回</mt-button>
					</span>
				</mt-header>

		<!-- 中间的 路由 router-view 区域 -->
		<transition>
			<router-view></router-view>
		</transition>
		

		<!-- 底部 Tabbar 区域 -->
		<nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item-css" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item-css" to="/member">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="mui-tab-item-css" to="/shopcar">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge" id="badge">{{ $store.getters.getAllCount }}</span></span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item-css" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>
	</div>
</template>

<script>
export default {
	data() {
		return {
			flag: false
		};
	},
	created() {
		this.flag = this.$route.path === "/home" ? false : true;
	},
    methods: {
		goBack() {
			// 点击后退
			this.$router.go(-1);
		}
	},
	watch: {
		"$route.path": function(newVal) {
			if(newVal === "/home") {
				this.flag = false;
			} else {
				this.flag = true;
			}
		}
	}
}
</script>

<style lang="scss" scoped>
.mint-header {
	z-index: 99;
}
.app-container {
	padding-top: 40px;
	padding-bottom: 50px;
	overflow-x: hidden;
}

.v-enter {
	opacity: 0;
	transform: translateX(100%);
}

.v-leave-to {
	opacity: 0;
	transform: translateX(-100%);
	position: absolute;
}

.v-enter-active,
.v-leave-active{
	transition: all 0.5s ease;
}


// 因为mui-tab-item这个css类和js的id名字一样，导致这个错误： [Intervention] Unable to preventDefault inside passive event listener due to target being treated as passive.
// 改类名，把.mui-tab-item改为mui-tab-item-css

.mui-bar-tab .mui-tab-item-css.mui-active {
    color: #007aff;
}

.mui-bar-tab .mui-tab-item-css {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
}

.mui-bar-tab .mui-tab-item-css .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
}

.mui-bar-tab .mui-tab-item-css .mui-icon~.mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
}

</style>
